*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    overflow-x: hidden;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #f8fafc;
}
::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* Selection */
::selection {
    background: #ccfbf1;
    color: #042f2e;
}

/* Navbar transitions */
.nav-logo {
    transition: color 0.4s ease;
}

#navbar.scrolled .nav-logo {
    color: #0f172a;
}

/* Smooth image loading */
img {
    opacity: 1;
    transition: opacity 0.4s ease;
}

/* Scroll reveal base — progressive enhancement */
.reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.revealed {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal {
        opacity: 0;
        transform: translateY(24px);
    }
    .reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }
}

/* Thin line decorations */
.line-decoration {
    position: relative;
}
.line-decoration::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 48px;
    height: 1px;
    background: #0d9488;
}

/* Hover underline animation */
.hover-underline {
    position: relative;
}
.hover-underline::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: #0d9488;
    transition: width 0.3s ease;
}
.hover-underline:hover::after {
    width: 100%;
}

/* Subtle pattern for section backgrounds */
.pattern-dots {
    background-image: radial-gradient(circle, #e2e8f0 1px, transparent 1px);
    background-size: 24px 24px;
}